.list{
    width: 100%;
    background-color: #f9f9f9;
    border: 1px solid #ccc;
    border-radius: 5px;
    box-sizing: border-box;
}
h2{
    margin-top: 0;
}
.messageitem{
    height: 50px;
    line-height: 50px;
    display: flex;
    justify-content: space-between;
    padding: 5px 0;
    border-bottom: 1px solid #ccc;
}
.messageitem:last-child {
  border-bottom: none;
}
//第二条span
.messageitem span:nth-child(2){
    font-size: 24px;
    color: blue;
    font-weight: bolder;
}
